Trade discount treatment depends on whether it is part of the sale transaction and known at the time of sale.

Under the West Bengal Sales Tax Act, 1994, a deduction is treated as a trade discount only if it forms part of the sale transaction and is known or ascertainable at the time of sale. An additional discount granted later through credit notes, contingent on continued future purchases and not reflected in the invoice, does not qualify and remains part of the sale price. By contrast, a turnover discount disclosed in the invoice and understood by buyers at the time of removal of goods, even if quantified later by reference to purchase targets, is a deductible trade discount.

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Issues: (i) Whether the additional trade discount claimed by the dealer was deductible from sale price or turnover under the West Bengal Sales Tax Act, 1994; (ii) Whether the turnover discount allowed on quarterly purchase volume was deductible as a trade discount.

Issue (i): Whether the additional trade discount claimed by the dealer was deductible from sale price or turnover under the West Bengal Sales Tax Act, 1994.

Analysis: Under section 2(31) of the West Bengal Sales Tax Act, 1994, only cash discount according to ordinary trade practice is expressly excluded from sale price, but a real trade discount also stands outside the computation of sale price. The discount claimed by the dealer was not reflected in the invoice, the full invoice price was realised, tax was charged on that full amount, and credit notes were issued only later against future purchases. The discount was contingent on continued purchases and was not shown to be an integral part of the sale transaction at the time of sale. On these facts, it did not answer the accepted commercial and legal conception of a trade discount.

Conclusion: The additional discount was not a trade discount and was not deductible.

Issue (ii): Whether the turnover discount allowed on quarterly purchase volume was deductible as a trade discount.

Analysis: The turnover discount was expressly indicated in the invoices and was known to the buyers at the time of removal of goods, though its precise amount was quantified later because it depended on achievement of the purchase target. Such a discount, though computed later and granted through credit notes, had already been recognised as a trade discount in the relevant commercial sense. A discount of this kind is excluded from sale price and turnover when it is known at the time of sale and is part of the trading arrangement.

Conclusion: The turnover discount was a trade discount and was deductible.

Final Conclusion: The challenge succeeded only in part, with the additional discount disallowed and the turnover discount allowed as a deductible trade discount.

Ratio Decidendi: A deduction qualifies as a trade discount only when it is part of the sale transaction and known or ascertainable at the time of sale, whereas a later credit-note concession contingent on future purchases does not form part of sale price.

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